Shaft coupling hub



FIG. 1 is a left front perspective view of a shaft coupling hub;

FIG. 2 is a right front perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a perspective view of the shaft coupling hub in a state of use in which the shaft coupling hub is connected to another shaft coupling hub such that two shafts are connected to each other by the shaft coupling hubs.

The broken lines shown in the drawing are for the purpose of depicting portions of the article that form no part of the claim. The broken lines shown in FIG. 9 are for the purpose of illustrating environment that forms no part of the claim. 

CLAIM The ornamental design for a shaft coupling hub, as shown and described. 